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David

@superd

Riddle solved: Why was Roman concrete so durable?

David L. Chandlernews.mit.edu
Thumbnail of Riddle solved: Why was Roman concrete so durable?
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Gordon DeWitte

@gordo

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David Nguyen

@unfnshd

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David Johnson

@davidj3d

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David Turnbull

@davidturnbull

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Kirk Damer

@kirkdamer

Peter Harvey

Peter Harvey • 2 cards

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David Bourke

@davidjbourke